package main 

import (
	"fmt"
)

func main(){

	var month byte 

	fmt.Println("input month")
	fmt.Scanf("%d",&month)

	switch month {
		case 3,4,5:
			fmt.Println("spring")
		case 6,7,8:
			fmt.Println("summer")
		case 9,10,11:
			fmt.Println("auton")
		case 12,1,2:
			fmt.Println("td")
		default:
			fmt.Println("unknow")
	}
}